Improvement in ventilators



UNITED STATES PATENT OFFICE,-

TREAT T. PROSSER, OF FOND DU LAO, WISCONSIN.

IMPROVEMENT lN- VENTI LATORS.

Specification forming part of Letters Patent No. 37,772, dated February 24, 1863.

.To all whom it may concern:

Be it known that l, TREAT T. PRossEE, of the town and county of Fond du Lac, State of Wisconsin, have invented a new and Improved Ventilator for Windows, Transom-Lights, Snc.; and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, forming a part of this specification, and showing the essential principles of this invention.

ln these drawings, Figure l represents the ventilator as completed for use, and with the apertures or openings closed. Fig. 2 represents the movable piece for opening and closing the apertures. Fig. 3 represents the ventilator wide open.

In the construction of this ventilator I cause a pane oi'glass or any other transparent substance used for the transmission of light, through windows, doors, transom-lights, Src., to be perforated as shown in Fig. 3, or with openings of any other form, and over this I apply a disk or register of transparent material, as may be seen in Fig. 2, for example, so arranged and constructed that by any sixn pie movement ofthe register or valve, Fig.,2, the apertures A A A in the glass pane may be opened, as seen in Fig. 3, or closed, as seen in Fig. 1.

In Fig. 1,0 C O show the parts of the pane not removed, and in Figs.2 and 3 A A A show the parts removed from the pane and the register, B B B in these figures showing the parts left in the latter.

The object of this invention is to furnish a ventilator simple and cheap in its construction, 4

that may be applied to a pane ot' glass in a window, glass door, or transom-light without obstructing the light or interfering wit-h the observation outside of the room or chamber by persons within.

I am well aware that ventilators of similar form, but made of wood, metal, or some otherl opaque substance, have been longknown and used, but besides being more or less offensive to the sight, particularly in windows fronting the street or other public thoroughfare, theseA obstruct more or less the light, and thus darken the interior of the room, and interfere to some extent to the use of the window in looking out.

This ventilator may even be made ornamental by glass of different colors.

By my invention I use a disk of only one piece for covering the orifices and adjacent parts of the pane, thus avoiding the use of a frame of opaque material, which would obstruct more or less the light through the window, and which ot' course' is one of the objects I .seek to avoid. 

